python, swig: fix bugs and restore Python ergonomics after libnvmf_context refactor#3293

igaw merged 3 commits intolinux-nvme:masterlinux-nvme/nvme-cli:masterfrom

martin-belanger:swig-python-bindings-fix-v2martin-belanger/nvme-cli:swig-python-bindings-fix-v2Copy head branch name to clipboard